Abstract: A barrier guard for a machine having a machine surface including a grille having a plurality of horizontal bars, a plurality of links having first ends pivotally mounting the grille and second ends pivotally mounted on the machine, brackets mounted on the machine, slots in the brackets, roller followers mounted on the grille and located in the slots for guiding movement of the grille in a predetermined path as it is caused to pivot relative to the links, a base bar on the grille for providing progressively greater clearances from the machine surface as the grille moves in a predetermined direction, and detents for retaining the grille in a plurality of adjusted positions.